diff --git a/libs/vr/libdvr/dvr_api.cpp b/libs/vr/libdvr/dvr_api.cpp
index d14f040..e099f6a 100644
--- a/libs/vr/libdvr/dvr_api.cpp
+++ b/libs/vr/libdvr/dvr_api.cpp
@@ -12,6 +12,7 @@
 #include <dvr/dvr_display_manager.h>
 #include <dvr/dvr_performance.h>
 #include <dvr/dvr_surface.h>
+#include <dvr/dvr_tracking.h>
 #include <dvr/dvr_vsync.h>
 
 // Headers not yet moved into libdvr.
diff --git a/libs/vr/libdvr/include/dvr/dvr_api.h b/libs/vr/libdvr/include/dvr/dvr_api.h
index 024cae9..fef8512 100644
--- a/libs/vr/libdvr/include/dvr/dvr_api.h
+++ b/libs/vr/libdvr/include/dvr/dvr_api.h
@@ -10,7 +10,7 @@
 #include <dvr/dvr_display_types.h>
 #include <dvr/dvr_hardware_composer_types.h>
 #include <dvr/dvr_pose.h>
-#include <dvr/dvr_tracking.h>
+#include <dvr/dvr_tracking_types.h>
 
 #ifdef __cplusplus
 extern "C" {
@@ -51,6 +51,12 @@
 typedef struct DvrSurfaceAttributeValue DvrSurfaceAttributeValue;
 typedef struct DvrSurfaceAttribute DvrSurfaceAttribute;
 
+typedef struct DvrReadBuffer DvrReadBuffer;
+typedef struct DvrTrackingCamera DvrTrackingCamera;
+typedef struct DvrTrackingFeatureExtractor DvrTrackingFeatureExtractor;
+typedef struct DvrTrackingSensors DvrTrackingSensors;
+typedef struct DvrWriteBufferQueue DvrWriteBufferQueue;
+
 // Note: To avoid breaking others during active development, only modify this
 // struct by appending elements to the end.
 // If you do feel we should to re-arrange or remove elements, please make a
@@ -379,6 +385,8 @@
     DvrTrackingFeatureExtractor** out_extractor);
 typedef void (*DvrTrackingFeatureExtractorDestroyPtr)(
     DvrTrackingFeatureExtractor* extractor);
+typedef void (*DvrTrackingFeatureCallback)(void* context,
+                                           const DvrTrackingFeatures* event);
 typedef int (*DvrTrackingFeatureExtractorStartPtr)(
     DvrTrackingFeatureExtractor* extractor,
     DvrTrackingFeatureCallback callback, void* context);
@@ -388,6 +396,8 @@
     DvrTrackingFeatureExtractor* extractor, DvrReadBuffer* buffer,
     const DvrTrackingBufferMetadata* metadata, bool* out_skipped);
 
+typedef void (*DvrTrackingSensorEventCallback)(void* context,
+                                               DvrTrackingSensorEvent* event);
 typedef int (*DvrTrackingSensorsCreatePtr)(DvrTrackingSensors** out_sensors,
                                            const char* mode);
 typedef void (*DvrTrackingSensorsDestroyPtr)(DvrTrackingSensors* sensors);